DaSaSo/DaSaSo.ViewModel/ImpregnierungListViewModel.cs

using DaSaSo.Domain.Model;
using DaSaSo.Domain.Services;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DaSaSo.ViewModel
{
    public class ImpregnierungListViewModel : BaseViewModel
    {
        public ObservableCollection<Impregnation> Impregnations;
        private readonly IDataService<Impregnation> _impregnationService;
        bool _isLoading;

        public bool IsLoading {
            get => _isLoading;
            set
            {
                if(_isLoading != value)
                {
                    _isLoading = value;
                    OnPropertyChanged();
                }
            }
        }

        public ImpregnierungListViewModel(IDataService<Impregnation> impregnationService)
        {
            IsLoading = true;
            Impregnations = new ObservableCollection<Impregnation>();
            _impregnationService = impregnationService;
            LoadImpregnations();

        }

        private async void LoadImpregnations()
        {
            var impregList = await _impregnationService.GetAll();
            InitCollection(Impregnations, impregList);
            IsLoading = false;
        }

        private void InitCollection(ObservableCollection<Impregnation> target, IEnumerable<Impregnation> source)
        {
            target.Clear();
            foreach (var i in source)
                target.Add(i);
        }
    }
}